Ladder rail clamp



FIG. 1 is a right perspective view of a ladder rail clamp embodying my new design;

FIG. 2 is a top plan thereof;

FIG. 3 is a bottom plan thereof;

FIG. 4 is a front elevation thereof;

FIG. 5 is a rear elevation thereof;

FIG. 6 is a left side elevation thereof, with a right side elevation being a mirror image thereof. 

The ornamental design for a ladder rail clamp, as shown and described. 